Threading Left-hand threadLeft-hand thread Right-hand thread Right-hand thread Threading methods TPGB for internal threading External threading (Left-hand thread / Right-hand thread) External thread Toolholder Left-hand Toolholder Right-hand Insert Left-hand Insert Right-hand The direction ofspindle revolutionM04 The direction ofspindle revolutionM03 Toolholder Right-hand Toolholder Left-hand Insert Right-hand Insert Left-hand The direction ofspindle revolutionM04 The direction ofspindle revolutionM03 Toolholder Left-hand Toolholder Right-hand Insert Left-hand Insert Right-hand J The direction ofspindle revolutionM03 The direction ofspindle revolutionM04 Toolholder Right-hand Toolholder Left-hand Insert Right-hand Insert Left-hand The direction ofspindle revolutionM03 The direction ofspindle revolutionM04 * These tables are based on KTN / KTNS / KTT / KTTX toolholder. Internal threading (Left-hand thread / Right-hand thread) Internal thread Toolholder Left-hand Toolholder Right-hand Insert Left-hand Insert Right-hand The direction ofspindle revolutionM04 The direction ofspindle revolutionM03 Toolholder Right-hand Toolholder Left-hand Insert Right-hand Insert Left-hand The direction ofspindle revolutionM03 The direction ofspindle revolutionM04 * These tables are based on SIN / CIN toolholder. For KITG (for large Internal threading), left-hand insert for right-hand toolholder, right-hand insert for left-hand toolholder. J52